XdCxRhDW54/XdCxRhDW.Framework/ILLink/ILLink.Descriptors.LibraryBuild.xml

<linker>
  <assembly fullname="System.Diagnostics.DiagnosticSource">
    <type fullname="System.Diagnostics.Metrics.MetricsEventSource">
      <!-- Used by System.Private.CoreLib via reflection to init the EventSource -->
      <method name="GetInstance" />
    </type>
  </assembly>
</linker>